Unable to Find LUN in Virtual Machine

320GB Lun assigned in a storage and mounted in Virtual Machine. In virtual machine, physical volume, VG and LV created. Also mounted LUN.
Some day ago VM crashed and LUN has been lost.(320 gb data of mysql).
Now vm recovered but still LUN not able to scan.

How do I manually add the LUN?
How to scan and how to mount with lvm?
Kindly suggest.